Island



(No Model.) v

J. HARLESWORTH.

SIFTER. l

,Nox 482,545. Patented sept. 1s, 1892.

WITNESEIE INI/INTLE.'

UNITED STATES PATENT OFFICE.

JAMES CHARIiESlVORTH, OF PROVIDENCE, RHODE ISLAND.

SlFTER.

SPECIFICATION forming part of Letters Patent No. 482,545, datedSeptember 13, 1892.

Application iilcd April 13, 1892.

T0 all whom t may concern.-

Be it known that I, JAMES CHARLESWORTH, of the city of Providence, inthe county of Providence and State of Rhode Island, have inventedcertain new and useful Improvements in Sifters; and I hereby declarethat the following is a full, clear, and exact description of the same,reference being had to the accompanying drawings, forming a part of thisspecification.

This invention has reference to improvements in sifters especiallyadapted for sifting ashes, but which may be used, with slightalterations, for sifting other materials.

The object of the invention, is to produce a sifter which may be rapidlyreciprocated to thoroughly sift the material placed therein.

The further object of the invention is to produce a mechanical movementby which reeiprocation may be imparted to a mechanism with a higherdegree of speed than has heretofore been accomplished.

The invention consists in certain peculiar features of construction andcombination of parts, which will hereinafter be more fully described,and pointed out in the claim.

Figure 1 represents a top view of the im proved sifter, the covers ofthe case being removed. Fig. 2 represents a horizontal sectional view ofthe sitter to more clearly show its construction and to indicate itsoperation by means of the improved mechanical movement.

Similar numbers of reference designate corresponding parts throughout.

In the drawings, 5 indicates a case oblong in shape and formed of anysuitable material. This ease is furnished with a hinged cover 6 toprovide ready access to the interior, and the bottom of the case is cutaway at its central portion to form an opening through which the siftedparticles may drop. The edge of this opening is provided with a collar7, generally of sheet metal, adapted to fit the top of a barrel. At therear of the case 5 is secured the extension-case S for containing themechanism by which reciprocation is imparted to the sieve.

Pivoted on each side of the case 5 on its interior surface is an arm i),the lower porn tions of these arms being connected together by a shaft10, and mounted on this shaft are Serial hid/128,947. (No modeLlbrackets 11, the upper portions of which are secured to the-lower edgesof the side frames 12 12. VThe ends of these frames are connected by thecross-pieces 13 and 14, the piece 13 being braced by the braces 15 15.The front end of the case 5 is provided with the buffer-spring 1G.

Extending through a vertical slot in the back of the case 5 is an arm17, which is bolted to the end 14 of the reciprocating frame and has atongue 18 extending inward beyond this end. The sieve 19 may be of anyconvenient form to be heldin the reciprocating frame and is supported onthe tongue 1S and on the braces 15 15.

Formed in partv with the arm 17 or secured thereto is a member 20, thecentral portion of which is eut away to i'orm an opening, having aplurality of cam-shoulders 21 21 with depressions between them, and themember 2O is supported by the arms 22 22, pivoted to the lower sidesthereof and at their upper ends to the sides of the extension-case. Therear end of this case is provided with the spring-buffer 23.

Journaled in bearings secured to the sides of the extension-case is ashaft 24, which is adapted to be rotated by the crank 25, secured to theouter end thereof, and mounted on this shaft is a member 26, having aplurality of arms 27 27, each of which is provided with a bearing-roll28, journaled in the outer end thereof, the number of these arms beingodd wh enthe number of cam-shoulders 21 21 on the member 2O is even, andvice versa. In the drawings the rotatable number 26 is shown as havingthree of these arms and bearing-rolls, and the member 20 as having twocam-shoulders. It is, however, obvious that these numbers may be variedat will without departing from the spirit of my invention.

By the rotation of the member 26 the rolls 28 will ride over thecam-shoulders 21 and will cause the member 2O to move first in onedirection and then in the opposite. The directions in which the arms 27extend are such that as the bearing-roll on one arm is leaving onecamshoulder the roll on the next arm is approaching the apex of the nextcam-shoulder, thus producing a very steady and rapid reciprocation ofthe member 2() and of the movable mechanism connected therewith. It

IOS

is, of course, necessary that the cam-shoulders should be so locatedthat it will not be possible for the bearing-rolls to be brought to bearon the apeXes.

Havingv thus described my invention, I claim as new and desire to secureby Letters Patent-- The combination, with the case 5, having anextension 8, an opening in the bottom of the oase surrounded by thecollar '7, the arms 9 9, pivoted at their upper ends to the sides of thecase and having their lower ends connected bythe shaft 10, thebraekets11, mounted on said shaft, a frame composed of the sides 12 12, the ends13 and 14:, and the braces 15 15, supported on said brackets, and asieve 19, supported in said frame, of the member 20, pivotaliy supportedin the extensioncase by the arms 22 22 and having the arm 17 extendinginto the oase 5 and secured to end 14 of the sieve-frame, cam-shoulders2l 21, formed around an opening in the member 20, a shaft 24, journaledin bearings in the sides of the extension-case, rotatable by a crank,and a member 26, having arms 27 27, and bearing-rolls 28 28, journaiedin the ends of said arms, mounted on said shaft, as described.

In witness whereof I have hereunto set my hand.

JAMES OHARLESWORTH. Witnesses:

M. F. BLIGH, H. J. MILLER.

